2005-11-15 15:58:03 +00:00
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/**
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* @file notify_payload.c
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*
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2005-11-28 18:24:10 +00:00
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* @brief Implementation of notify_payload_t.
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2005-11-15 15:58:03 +00:00
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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2006-04-10 08:07:38 +00:00
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2005-11-15 15:58:03 +00:00
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#include <stddef.h>
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#include "notify_payload.h"
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2006-03-23 15:25:43 +00:00
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#include <daemon.h>
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2005-11-23 09:57:18 +00:00
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#include <encoding/payloads/encodings.h>
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2005-11-15 15:58:03 +00:00
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2005-12-02 11:38:56 +00:00
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/**
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* String mappings for notify_message_type_t.
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*/
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mapping_t notify_message_type_m[] = {
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{UNSUPPORTED_CRITICAL_PAYLOAD, "UNSUPPORTED_CRITICAL_PAYLOAD"},
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{INVALID_IKE_SPI, "INVALID_IKE_SPI"},
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{INVALID_MAJOR_VERSION, "INVALID_MAJOR_VERSION"},
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{INVALID_SYNTAX, "INVALID_SYNTAX"},
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2005-12-05 12:21:38 +00:00
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{INVALID_MESSAGE_ID, "INVALID_MESSAGE_ID"},
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2005-12-02 11:38:56 +00:00
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{INVALID_SPI, "INVALID_SPI"},
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{NO_PROPOSAL_CHOSEN, "NO_PROPOSAL_CHOSEN"},
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{INVALID_KE_PAYLOAD, "INVALID_KE_PAYLOAD"},
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{AUTHENTICATION_FAILED, "AUTHENTICATION_FAILED"},
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{SINGLE_PAIR_REQUIRED, "SINGLE_PAIR_REQUIRED"},
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{NO_ADDITIONAL_SAS, "NO_ADDITIONAL_SAS"},
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{INTERNAL_ADDRESS_FAILURE, "INTERNAL_ADDRESS_FAILURE"},
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{FAILED_CP_REQUIRED, "FAILED_CP_REQUIRED"},
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2006-05-24 09:05:21 +00:00
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{TS_UNACCEPTABLE, "TS_UNACCEPTABLE"},
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2005-12-02 11:38:56 +00:00
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{INVALID_SELECTORS, "INVALID_SELECTORS"},
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2005-12-05 12:21:38 +00:00
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{INITIAL_CONTACT, "INITIAL_CONTACT"},
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{SET_WINDOW_SIZE, "SET_WINDOW_SIZE"},
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2005-12-02 11:38:56 +00:00
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{MAPPING_END, NULL}
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};
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2005-11-24 09:17:51 +00:00
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typedef struct private_notify_payload_t private_notify_payload_t;
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2005-11-15 15:58:03 +00:00
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/**
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2005-11-28 18:24:10 +00:00
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* Private data of an notify_payload_t object.
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2005-11-15 15:58:03 +00:00
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*
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*/
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2005-11-24 09:17:51 +00:00
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struct private_notify_payload_t {
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2005-11-15 15:58:03 +00:00
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/**
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2005-11-28 18:24:10 +00:00
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* Public notify_payload_t interface.
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2005-11-15 15:58:03 +00:00
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*/
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notify_payload_t public;
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/**
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2005-11-28 18:24:10 +00:00
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* Next payload type.
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2005-11-15 15:58:03 +00:00
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*/
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u_int8_t next_payload;
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/**
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2005-11-28 18:24:10 +00:00
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* Critical flag.
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2005-11-15 15:58:03 +00:00
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*/
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bool critical;
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/**
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2005-11-28 18:24:10 +00:00
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* Length of this payload.
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2005-11-15 15:58:03 +00:00
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*/
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u_int16_t payload_length;
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/**
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2005-11-28 18:24:10 +00:00
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* Protocol id.
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2005-11-15 15:58:03 +00:00
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*/
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u_int8_t protocol_id;
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/**
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2005-11-28 18:24:10 +00:00
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* Spi size.
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2005-11-15 15:58:03 +00:00
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*/
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u_int8_t spi_size;
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/**
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2005-11-28 18:24:10 +00:00
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* Notify message type.
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2005-11-15 15:58:03 +00:00
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*/
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u_int16_t notify_message_type;
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/**
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2005-11-28 18:24:10 +00:00
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* Security parameter index (spi).
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2005-11-15 15:58:03 +00:00
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*/
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chunk_t spi;
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/**
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2005-11-28 18:24:10 +00:00
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* Notification data.
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2005-11-15 15:58:03 +00:00
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*/
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chunk_t notification_data;
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2006-03-23 15:25:43 +00:00
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/**
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* Assigned logger
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*/
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logger_t *logger;
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2005-11-15 15:58:03 +00:00
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/**
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* @brief Computes the length of this payload.
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*
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* @param this calling private_ke_payload_t object
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*/
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2005-11-28 18:24:10 +00:00
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void (*compute_length) (private_notify_payload_t *this);
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2005-11-15 15:58:03 +00:00
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};
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/**
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2005-11-28 18:24:10 +00:00
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* Encoding rules to parse or generate a IKEv2-Notify Payload.
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2005-11-15 15:58:03 +00:00
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*
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* The defined offsets are the positions in a object of type
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* private_notify_payload_t.
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*
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*/
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encoding_rule_t notify_payload_encodings[] = {
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/* 1 Byte next payload type, stored in the field next_payload */
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{ U_INT_8, offsetof(private_notify_payload_t, next_payload) },
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/* the critical bit */
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{ FLAG, offsetof(private_notify_payload_t, critical) },
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/* 7 Bit reserved bits, nowhere stored */
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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/* Length of the whole payload*/
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{ PAYLOAD_LENGTH, offsetof(private_notify_payload_t, payload_length) },
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/* Protocol ID as 8 bit field*/
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{ U_INT_8, offsetof(private_notify_payload_t, protocol_id) },
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/* SPI Size as 8 bit field*/
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{ SPI_SIZE, offsetof(private_notify_payload_t, spi_size) },
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/* Notify message type as 16 bit field*/
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{ U_INT_16, offsetof(private_notify_payload_t, notify_message_type) },
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/* SPI as variable length field*/
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{ SPI, offsetof(private_notify_payload_t, spi) },
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/* Key Exchange Data is from variable size */
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{ NOTIFICATION_DATA, offsetof(private_notify_payload_t, notification_data) }
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};
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2005-11-17 12:49:35 +00:00
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/*
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1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! Next Payload !C! RESERVED ! Payload Length !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! Protocol ID ! SPI Size ! Notify Message Type !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! !
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~ Security Parameter Index (SPI) ~
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! !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! !
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~ Notification Data ~
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! !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of payload_t.verify.
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2005-11-17 12:49:35 +00:00
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*/
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static status_t verify(private_notify_payload_t *this)
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{
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if (this->protocol_id > 3)
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{
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/* reserved for future use */
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return FAILED;
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}
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2006-02-14 14:52:00 +00:00
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/* TODO: Check all kinds of notify */
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2005-11-17 12:49:35 +00:00
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2006-02-14 14:52:00 +00:00
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if (this->notify_message_type == INVALID_KE_PAYLOAD)
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{
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/* check notification data */
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diffie_hellman_group_t dh_group;
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if (this->notification_data.len != 2)
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{
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return FAILED;
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}
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dh_group = ntohs(*((u_int16_t*)this->notification_data.ptr));
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2006-03-23 15:25:43 +00:00
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switch (dh_group)
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2006-02-14 14:52:00 +00:00
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{
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2006-03-23 15:25:43 +00:00
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case MODP_768_BIT:
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case MODP_1024_BIT:
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case MODP_1536_BIT:
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case MODP_2048_BIT:
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case MODP_3072_BIT:
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case MODP_4096_BIT:
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case MODP_6144_BIT:
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case MODP_8192_BIT:
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break;
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default:
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this->logger->log(this->logger, ERROR, "Bad DH group (%d)", dh_group);
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return FAILED;
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2006-02-14 14:52:00 +00:00
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}
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}
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2005-11-17 12:49:35 +00:00
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return SUCCESS;
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}
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2005-11-15 15:58:03 +00:00
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of payload_t.get_encoding_rules.
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2005-11-15 15:58:03 +00:00
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*/
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2005-11-28 18:24:10 +00:00
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static void get_encoding_rules(private_notify_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
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2005-11-15 15:58:03 +00:00
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{
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*rules = notify_payload_encodings;
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*rule_count = sizeof(notify_payload_encodings) / sizeof(encoding_rule_t);
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of payload_t.get_type.
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2005-11-15 15:58:03 +00:00
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*/
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static payload_type_t get_type(private_notify_payload_t *this)
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{
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2005-12-02 11:38:56 +00:00
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return NOTIFY;
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2005-11-15 15:58:03 +00:00
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of payload_t.get_next_type.
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2005-11-15 15:58:03 +00:00
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*/
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static payload_type_t get_next_type(private_notify_payload_t *this)
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{
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return (this->next_payload);
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of payload_t.set_next_type.
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2005-11-15 15:58:03 +00:00
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*/
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2005-11-28 18:24:10 +00:00
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static void set_next_type(private_notify_payload_t *this,payload_type_t type)
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2005-11-15 15:58:03 +00:00
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{
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this->next_payload = type;
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of payload_t.get_length.
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2005-11-15 15:58:03 +00:00
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*/
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static size_t get_length(private_notify_payload_t *this)
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{
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this->compute_length(this);
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return this->payload_length;
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of private_notify_payload_t.compute_length.
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2005-11-15 15:58:03 +00:00
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*/
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2005-11-28 18:24:10 +00:00
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static void compute_length (private_notify_payload_t *this)
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2005-11-15 15:58:03 +00:00
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{
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size_t length = NOTIFY_PAYLOAD_HEADER_LENGTH;
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if (this->notification_data.ptr != NULL)
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{
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length += this->notification_data.len;
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}
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if (this->spi.ptr != NULL)
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{
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length += this->spi.len;
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}
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this->payload_length = length;
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2005-11-28 18:24:10 +00:00
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}
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2005-11-15 15:58:03 +00:00
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of notify_payload_t.get_protocol_id.
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2005-11-15 15:58:03 +00:00
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*/
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2005-11-28 18:24:10 +00:00
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static u_int8_t get_protocol_id(private_notify_payload_t *this)
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2005-11-15 15:58:03 +00:00
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{
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return this->protocol_id;
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of notify_payload_t.set_protocol_id.
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2005-11-15 15:58:03 +00:00
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*/
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2005-11-28 18:24:10 +00:00
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static void set_protocol_id(private_notify_payload_t *this, u_int8_t protocol_id)
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2005-11-15 15:58:03 +00:00
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{
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this->protocol_id = protocol_id;
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of notify_payload_t.get_notify_message_type.
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2005-11-15 15:58:03 +00:00
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*/
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2005-11-28 18:24:10 +00:00
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static u_int16_t get_notify_message_type(private_notify_payload_t *this)
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2005-11-15 15:58:03 +00:00
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{
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return this->notify_message_type;
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of notify_payload_t.set_notify_message_type.
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2005-11-15 15:58:03 +00:00
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*/
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2005-11-28 18:24:10 +00:00
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static void set_notify_message_type(private_notify_payload_t *this, u_int16_t notify_message_type)
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2005-11-15 15:58:03 +00:00
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{
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this->notify_message_type = notify_message_type;
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of notify_payload_t.get_spi.
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2005-11-15 15:58:03 +00:00
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*/
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2005-11-28 18:24:10 +00:00
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static chunk_t get_spi(private_notify_payload_t *this)
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2005-11-15 15:58:03 +00:00
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{
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return (this->spi);
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}
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/**
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2005-11-28 18:24:10 +00:00
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* Implementation of notify_payload_t.set_spi.
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2005-11-15 15:58:03 +00:00
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*/
|
2005-11-28 18:24:10 +00:00
|
|
|
static void set_spi(private_notify_payload_t *this, chunk_t spi)
|
2005-11-15 15:58:03 +00:00
|
|
|
{
|
|
|
|
/* destroy existing data first */
|
|
|
|
if (this->spi.ptr != NULL)
|
|
|
|
{
|
|
|
|
/* free existing value */
|
2006-04-10 08:07:38 +00:00
|
|
|
free(this->spi.ptr);
|
2005-11-15 15:58:03 +00:00
|
|
|
this->spi.ptr = NULL;
|
|
|
|
this->spi.len = 0;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2006-04-10 08:07:38 +00:00
|
|
|
this->spi.ptr = clalloc(spi.ptr,spi.len);
|
2005-11-28 18:24:10 +00:00
|
|
|
|
2005-11-15 15:58:03 +00:00
|
|
|
this->spi.len = spi.len;
|
|
|
|
this->spi_size = spi.len;
|
|
|
|
this->compute_length(this);
|
|
|
|
|
2005-11-28 18:24:10 +00:00
|
|
|
}
|
2005-11-15 15:58:03 +00:00
|
|
|
|
|
|
|
/**
|
2005-11-28 18:24:10 +00:00
|
|
|
* Implementation of notify_payload_t.get_notification_data.
|
2005-11-15 15:58:03 +00:00
|
|
|
*/
|
2005-11-28 18:24:10 +00:00
|
|
|
static chunk_t get_notification_data(private_notify_payload_t *this)
|
2005-11-15 15:58:03 +00:00
|
|
|
{
|
|
|
|
return (this->notification_data);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2005-11-28 18:24:10 +00:00
|
|
|
* Implementation of notify_payload_t.set_notification_data.
|
2005-11-15 15:58:03 +00:00
|
|
|
*/
|
2005-11-28 18:24:10 +00:00
|
|
|
static status_t set_notification_data(private_notify_payload_t *this, chunk_t notification_data)
|
2005-11-15 15:58:03 +00:00
|
|
|
{
|
|
|
|
/* destroy existing data first */
|
|
|
|
if (this->notification_data.ptr != NULL)
|
|
|
|
{
|
|
|
|
/* free existing value */
|
2006-04-10 08:07:38 +00:00
|
|
|
free(this->notification_data.ptr);
|
2005-11-15 15:58:03 +00:00
|
|
|
this->notification_data.ptr = NULL;
|
|
|
|
this->notification_data.len = 0;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2006-04-10 08:07:38 +00:00
|
|
|
this->notification_data.ptr = clalloc(notification_data.ptr,notification_data.len);
|
2005-11-15 15:58:03 +00:00
|
|
|
this->notification_data.len = notification_data.len;
|
|
|
|
this->compute_length(this);
|
|
|
|
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
2005-11-22 11:54:58 +00:00
|
|
|
/**
|
2005-11-28 18:24:10 +00:00
|
|
|
* Implementation of notify_payload_t.destroy and notify_payload_t.destroy.
|
2005-11-22 11:54:58 +00:00
|
|
|
*/
|
|
|
|
static status_t destroy(private_notify_payload_t *this)
|
|
|
|
{
|
|
|
|
if (this->notification_data.ptr != NULL)
|
|
|
|
{
|
2006-04-10 08:07:38 +00:00
|
|
|
free(this->notification_data.ptr);
|
2005-11-22 11:54:58 +00:00
|
|
|
}
|
|
|
|
if (this->spi.ptr != NULL)
|
|
|
|
{
|
2006-04-10 08:07:38 +00:00
|
|
|
free(this->spi.ptr);
|
2005-11-22 11:54:58 +00:00
|
|
|
}
|
|
|
|
|
2006-04-10 08:07:38 +00:00
|
|
|
free(this);
|
2005-11-22 11:54:58 +00:00
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
2005-11-15 15:58:03 +00:00
|
|
|
/*
|
|
|
|
* Described in header
|
|
|
|
*/
|
|
|
|
notify_payload_t *notify_payload_create()
|
|
|
|
{
|
2006-04-10 08:07:38 +00:00
|
|
|
private_notify_payload_t *this = malloc_thing(private_notify_payload_t);
|
2005-11-28 18:24:10 +00:00
|
|
|
|
2005-11-15 15:58:03 +00:00
|
|
|
/* interface functions */
|
2005-11-17 12:49:35 +00:00
|
|
|
this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
|
2005-11-28 18:24:10 +00:00
|
|
|
this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
|
2005-11-15 15:58:03 +00:00
|
|
|
this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
|
|
|
|
this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
|
2005-11-28 18:24:10 +00:00
|
|
|
this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
|
2005-11-15 15:58:03 +00:00
|
|
|
this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_type;
|
2005-11-28 18:24:10 +00:00
|
|
|
this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
|
2005-11-15 15:58:03 +00:00
|
|
|
|
|
|
|
/* public functions */
|
|
|
|
this->public.get_protocol_id = (u_int8_t (*) (notify_payload_t *)) get_protocol_id;
|
2005-11-28 18:24:10 +00:00
|
|
|
this->public.set_protocol_id = (void (*) (notify_payload_t *,u_int8_t)) set_protocol_id;
|
2005-11-15 15:58:03 +00:00
|
|
|
this->public.get_notify_message_type = (u_int16_t (*) (notify_payload_t *)) get_notify_message_type;
|
2005-11-28 18:24:10 +00:00
|
|
|
this->public.set_notify_message_type = (void (*) (notify_payload_t *,u_int16_t)) set_notify_message_type;
|
2005-11-15 15:58:03 +00:00
|
|
|
this->public.get_spi = (chunk_t (*) (notify_payload_t *)) get_spi;
|
2005-11-28 18:24:10 +00:00
|
|
|
this->public.set_spi = (void (*) (notify_payload_t *,chunk_t)) set_spi;
|
2005-11-15 15:58:03 +00:00
|
|
|
this->public.get_notification_data = (chunk_t (*) (notify_payload_t *)) get_notification_data;
|
2005-11-28 18:24:10 +00:00
|
|
|
this->public.set_notification_data = (void (*) (notify_payload_t *,chunk_t)) set_notification_data;
|
|
|
|
this->public.destroy = (void (*) (notify_payload_t *)) destroy;
|
2005-11-15 15:58:03 +00:00
|
|
|
|
|
|
|
/* private functions */
|
|
|
|
this->compute_length = compute_length;
|
|
|
|
|
|
|
|
/* set default values of the fields */
|
2006-03-23 15:25:43 +00:00
|
|
|
this->critical = FALSE;
|
2005-11-15 15:58:03 +00:00
|
|
|
this->next_payload = NO_PAYLOAD;
|
|
|
|
this->payload_length = NOTIFY_PAYLOAD_HEADER_LENGTH;
|
|
|
|
this->protocol_id = 0;
|
|
|
|
this->notify_message_type = 0;
|
|
|
|
this->spi.ptr = NULL;
|
|
|
|
this->spi.len = 0;
|
2005-12-12 12:52:59 +00:00
|
|
|
this->spi_size = 0;
|
2005-11-15 15:58:03 +00:00
|
|
|
this->notification_data.ptr = NULL;
|
|
|
|
this->notification_data.len = 0;
|
2006-04-10 08:07:38 +00:00
|
|
|
this->logger = logger_manager->get_logger(logger_manager, PAYLOAD);
|
2005-11-15 15:58:03 +00:00
|
|
|
|
|
|
|
return (&(this->public));
|
|
|
|
}
|
|
|
|
|
2005-12-02 11:38:56 +00:00
|
|
|
/*
|
|
|
|
* Described in header.
|
|
|
|
*/
|
|
|
|
notify_payload_t *notify_payload_create_from_protocol_and_type(protocol_id_t protocol_id, notify_message_type_t notify_message_type)
|
|
|
|
{
|
|
|
|
notify_payload_t *notify = notify_payload_create();
|
|
|
|
|
|
|
|
notify->set_notify_message_type(notify,notify_message_type);
|
|
|
|
notify->set_protocol_id(notify,protocol_id);
|
|
|
|
|
|
|
|
return notify;
|
|
|
|
}
|